Question 1

Which metric prefix corresponds to $$10^{-6}$$?

Accepted Answer

micro

Question 2

Potassium melts at $$336.5\ 	ext{K}$$ and boils at $$1033\ 	ext{K}. $$What is the physical state of potassium at $$130^\circ 	ext{F}$$? (Hint: $$130^\circ 	ext{F} = 327.6\ 	ext{K})$$

Accepted Answer

solid

Question 3

An interpretation of the results of many tests is called:

Accepted Answer

a theory

Question 4

Which of the following is a compound?

Accepted Answer

sugar

Question 5

Which of these is a chemical property?

Accepted Answer

Helium is very nonreactive.

Question 6

Italian salad dressing is an example of:

Accepted Answer

a heterogeneous mixture

Question 7

Anything that has mass and occupies space is:

Accepted Answer

matter

Question 8

Which of the following best represents kinetic energy?

Accepted Answer

a ball rolling downhill

Question 9

Which pair of elements is in the same group on the periodic table?

Accepted Answer

barium and strontium

Question 10

An aluminum ion, $$	ext{Al}^{3+}$$, has:

Accepted Answer

13 protons and 10 electrons

Question 11

Express $$0.000002705 in $$scientific notation.

Accepted Answer

$$2.705 	imes 10$$^{-6}$$

Question 12

Which of the following elements is a metalloid?

Accepted Answer

Si

Question 13

What is the nuclear composition of $$^{35}	ext{Cl}$$?

Accepted Answer

17 protons and 18 neutrons

Question 14

Which of the following is a halogen?

Accepted Answer

Br

Question 15

Cations are formed by:

Accepted Answer

removing electrons from an atom

Question 16

When nitrogen becomes an ion, what is its most common oxidation state?

Accepted Answer

$$-3$$

Question 17

Which scientist developed a periodic table that could predict elements not yet discovered?

Accepted Answer

Mendeleev

Question 18

Which scientist developed the nuclear model of the atom?

Accepted Answer

Ernest Rutherford

Question 19

An exothermic reaction causes the surroundings to:

Accepted Answer

warm up

Question 20

What is the group number for the alkaline earth metals?

Accepted Answer

IIA

Step-by-Step Guidance for CHM 1040 Test #1 (Chapters 1–4)

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드